Attaching the eclipse cameras onto the 50-foot interferometer mount at Mount Wilson Observatory's machine shop, Pasadena, for use at the 1923 Pt. Loma eclipse. Two (2) unidentified men are seen within the steel structure, attaching a camera to the mount. The brick machine shop is behind them. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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